Medium Voltage Drives

Hitachi offer HIVECTOLHVI-E Series Medium Voltage VFD - Multi Level IGBT Drives up to 14.7mVA, voltage range 3.3 kV, 6.6 kV and 11 kV.

Today we offer our Customers the Most Appropriate Digital Technology, in AC Drives / AC Adjustable Speed Drive, tailored to their specific application requirements. Sanand, India based our local Manufacturing Facility ensures Long Term Technical Services and Spares Support. Local manufacturing will help Indian Customers to avail best in class product with Long Term Commitment of Spares and Services. This will also help customer to carry out FAT and train their maintenance engineers.

This world class Manufacturing Setup of MV Drives adopts Work Culture, Design, Manufacturing Process, Component Selection, and Quality and Testing Standards that are being followed at Hitachi Japan Manufacturing Facility. Multi Cell Topology of drive uses low voltage devices. It is user friendly and easy to maintain by customer.

MV VFD - Multi Level Drives is forced air cooled. Different voltage ratings 3.3kV, 6.6kV and 11kV are available for Medium Voltage Variable Frequency Drive. Intermittent ratings like 3kV, 4.16kV, 6kV are also available for our offered MVD.

In-House Regeneration Drive Test Facility is capable to demonstrate MV VFD characterization during FAT.

Features:

• Patented Design - Increases Reliability

• Pre-Charging:- It reduces charging inrush current of the transformer toless than its rated current. Normal charging methodrequires large charging current for equivalent ratingtransformer. Pre charge of the DC Filter capacitors in each cell iscarried out using external precharge circuit. These components are bypassed from the main power path andhence increase the reliability of the overall system. No change in existing electrical system required while going for  retro fitting of energy saving application.

• Cyclic Switching of the Cells:- Cyclic switching achieves equal utilization of each cell at any operating speed. It ensures even heating and stresses on each component. It increases the reliability of the drive.

• State-of-the-Art Technology

• Tailored to your Specific Application Requirements

• Long Term Technical Services and Spares Support

• Suitable for Indian Ambient Condition:- Designed for 50 degree centigrade except few ratings

• Input Harmonics Meets IEEE - 519 - 1992:- Multilpulse rectifier method reduces input side harmonics and conforms better than IEEE 519 - 1992 recommended performance without use of harmonic filters

• Output Waveform - Motor Friendly:- It controls the output waveform distortion and approximates it to sine waveform. Insignificant over heating due to harmonicsis observed in cable and motor. Voltage spikes observed at the motor winding is limited toless than 1000 V. This performance does not add anystresses on the motor insulation. Both above features allow use of existing motor whether safe orhazardous operating zone on variable torque load. Suitable for Induction and Synchronous motor application.

• Best for High Starting Torque:- Robust Sensor less vector control method provides smooth starting and operation with high torque loads without use of special feedback sensor. Hence this drive is most suitable for Rubber Mixer, Extruders,Agitators etc in addition to Pump and Fan applications.

• High Efficiency:- Typical 97% efficiency including input Dry type transformer

Applications:

• Pumps

• Compressors

• Fan / Exhausters

• Conveyors

• Centrifuges

• turbines

• extruders and Mixers/ Agitators

• Steel mills

• Winders

• Cement kilns

• Induced draft fans

• Forced draft fans

• Centrifugal applications like Sugar refining & Mining tandem

• Banbury's applications and many more...